1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Shared Memory Communications Direct over ISM devices (SMC-D) 3 * 4 * SMC-D ISM device structure definitions. 5 * 6 * Copyright IBM Corp. 2018 7 */ 8 9 #ifndef SMCD_ISM_H 10 #define SMCD_ISM_H 11 12 #include <linux/uio.h> 13 #include <linux/mutex.h> 14 15 #include "smc.h" 16 17 struct smcd_dev_list { /* List of SMCD devices */ 18 struct list_head list; 19 struct mutex mutex; /* Protects list of devices */ 20 }; 21 22 extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */ 23 extern bool smc_ism_v2_capable; /* HW supports ISM V2 and thus 24 * System EID is defined 25 */ 26 27 struct smc_ism_vlanid { /* VLAN id set on ISM device */ 28 struct list_head list; 29 unsigned short vlanid; /* Vlan id */ 30 refcount_t refcnt; /* Reference count */ 31 }; 32 33 struct smc_ism_position { /* ISM device position to write to */ 34 u64 token; /* Token of DMB */ 35 u32 offset; /* Offset into DMBE */ 36 u8 index; /* Index of DMBE */ 37 u8 signal; /* Generate interrupt on owner side */ 38 }; 39 40 struct smcd_dev; 41 42 int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev); 43 void smc_ism_set_conn(struct smc_connection *conn); 44 void smc_ism_unset_conn(struct smc_connection *conn); 45 int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id); 46 int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id); 47 int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size, 48 struct smc_buf_desc *dmb_desc); 49 int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc); 50 int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos, 51 void *data, size_t len); 52 int smc_ism_signal_shutdown(struct smc_link_group *lgr); 53 void smc_ism_get_system_eid(struct smcd_dev *dev, u8 **eid); 54 u16 smc_ism_get_chid(struct smcd_dev *dev); 55 void smc_ism_init(void); 56 #endif 57